Rahm Emanuel at a breakfast in Chicago. Politico CHICAGO (AP) — Chicago Mayor Rahm Emanuel apologized for the 2014 shooting of a black teenager on Wednesday during a special City Council meeting that was called to discuss a police abuse scandal at the center of the biggest crisis of his administration.

Emanuel is currently tasked with trying to restore the trust and confidence of city residents in both the police force and his own leadership amid fallout over the release of a video showing the killing of a black teen by a white officer.

Officer Jason Van Dyke is charged with first-degree murder in the death of 17-year-old Laquan McDonald, who appeared in the video to be walking away from Van Dyke as he was shot.

Emanuel addressed three main themes — justice, culture and community — and criticized the police department for being quick to shoot. He also said that the department's "supervision and leadership," as well as the oversight agencies "failed."

"I take responsibility for what happened because it happened on my watch. And if we're going to fix it I want you to understand it's my responsibility with you," Emanuel said. "But if we're also going to begin the healing process, the first step in that journey is my step.

"And I'm sorry."

Also Wednesday, at least four different groups of protesters planned to converge on City Hall. One of the demonstrators outside of the council hall before Emanuel's speech said the mayor must step aside.

"If he doesn't step down, there are going to be protests again and again," said Jim Rudd, a 25-year-old coffee shop worker. "And he's going to eventually lose the support of the City Council."

A Chicago Police officer takes part in the 11th Annual Chicago Police Memorial Foundation's Candlelight Vigil in Chicago, Illinois, September 16, 2014. Since the formation of the Chicago Police Department in the 1830s, 571 officers have fallen in the line of duty. REUTERS/Jim Young The McDonald footage — ordered to be released by a judge last month and made public hours after Van Dyke was charged — set off a chain of events that captured the attention of the country. Days of protests and marches followed, including one on the busiest shopping day of the year that partially shut down the city's most famous shopping district, Michigan Avenue.

A few days later, Emanuel announced that he had demanded and received the resignation of Police Superintendent Garry McCarthy, created a new task force for police accountability and expanded the use of body cameras.

But the anger did not subside, and every day there seemed to be another issue, including the release of hundreds of pages of documents that show police had described in their reports a far more threatening McDonald than the teen shown to the city and the world on video.

The situation became so volatile that Emanuel was forced to do something he rarely does: backtrack. After initially saying that a federal probe of the department would be "misguided" because the U.S. Attorney's office was already examining the McDonald shooting, Emanuel later said he welcomed such an investigation.

On Monday, U.S. Attorney General Loretta Lynch announced a Justice Department civil rights investigation to determine if there are patterns of racial disparity in the police department's use of force.

Emanuel then said the city would stop fighting the release of a second video that showed a police officer shooting a man in the back. That video was released Monday during a presentation in which Cook County State's Attorney Anita Alvarez said she would not charge the officer.

Later that night, the city released yet another video showing an inmate being dragged out of his cell by his handcuffed wrists. While a police review board previously found the officers' actions justified, Emanuel said he did not see how the treatment of the man — who later died following a reaction to an antipsychotics drug — could "possibly be acceptable" and said he did not consider the investigation closed.